DE2142365C3 - Prestressed concrete girder reinforced by haunches at the supports and the process for making it - Google Patents
Prestressed concrete girder reinforced by haunches at the supports and the process for making itInfo
- Publication number
- DE2142365C3 DE2142365C3 DE19712142365 DE2142365A DE2142365C3 DE 2142365 C3 DE2142365 C3 DE 2142365C3 DE 19712142365 DE19712142365 DE 19712142365 DE 2142365 A DE2142365 A DE 2142365A DE 2142365 C3 DE2142365 C3 DE 2142365C3
- Authority
- DE
- Germany
- Prior art keywords
- prestressed concrete
- tendon
- girder
- concrete
- bundles
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
- E04C3/00—Structural elongated elements designed for load-supporting
- E04C3/02—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces
- E04C3/20—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of concrete or other stone-like material, e.g. with reinforcements or tensioning members
- E04C3/26—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of concrete or other stone-like material, e.g. with reinforcements or tensioning members prestressed
Landscapes
- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Bridges Or Land Bridges (AREA)
- Manufacturing Of Tubular Articles Or Embedded Moulded Articles (AREA)
- Rod-Shaped Construction Members (AREA)
Description
F i g. 2 den Spannbetonträger nach F i g. 1 nach befindlichen Spangliedbündel 1 und 2 durch derenF i g. 2 the prestressed concrete beam according to FIG. 1 after located Spangliedbündel 1 and 2 by their
der Spannung der Spanngliedbündel, Ablenkung von der anfänglich geradlinigen Lage inthe tension of the tendon bundles, deflection from the initially straight position in
Fig. 3 den Querschnitt längs der Linie A-A in Richtung der inneren, unteren Ecken der Vouten3 shows the cross section along the line AA in the direction of the inner, lower corners of the haunches
^'S·2· mittels in den Zeichnungen nicht dargestellter, am^ 'S · 2 · by means of not shown in the drawings, am
Fig.4 einen Längsschnitt durch eine Ablenkvor- 5 oberen Teil des Spannbetonträgers angeordneter4 shows a longitudinal section through a deflecting front 5 arranged at the top of the prestressed concrete beam
richtung für die Spanngliedbündel, Zahnstangenwinde vorgenommen, welche diedirection for the tendon bundles, rack and pinion winch made which the
Fig.5 einen Querschnitt der Ablenkvorrichtung Dorne7 nach oben verschieben, auf die sich die5 a cross section of the deflection device mandrels 7 move upwards, on which the
nach F i g. 4, Spanngliedbündel 1 und 2 abstützen. Die Vcrschie-according to FIG. 4, support tendon bundles 1 and 2. The different
F i g. 6 einen Längsschnitt durch eine weitere Ab- bung der Dorne 7 lenkt die Spanngliedbündel 1 undF i g. 6 shows a longitudinal section through a further bend of the mandrels 7 directs the tendon bundles 1 and 2
lenkvorrichtung für die Spanngliedbündel, xo 2 ab, die infolge ihrer Verankerung an den Endensteering device for the tendon bundles, xo 2 from, which as a result of their anchoring at the ends
Fig. 7 einen Querschnitt der Ablenkvorrichtung gespannt werden. Die Blockierung der Spannglied-Fig. 7 shows a cross section of the deflection device being tensioned. The blocking of the tendon
nach F i g. 6, bündel in dieser Stellung wird mit Muttern 6 bewerk-according to FIG. 6, bundle in this position is done with nuts 6
Fig.8 in schematischer Darstellung einen Längs- stelligt, die Halter8 auf den Schraubenbolzen5 festschnitt durch ein weiteres Ausführungsbeispiel eines ziehen und damit auch die Dorne 7 und die Spann-Spannbetonträgers nach der Erfindung vor der 15 gliedbündel 1 und 2 in der abgelenkten Stellung Spannung der Spanngliedbündel, blockieren.8 in a schematic representation a longitudinal position, the holder 8 securely cut onto the screw bolt 5 by a further embodiment of a pull and thus also the mandrels 7 and the prestressed prestressed concrete beam according to the invention in front of the 15 link bundles 1 and 2 in the deflected position Tension of tendon bundles, block.
Fig. 9 den Spannbetonträger nach Fig. 8 nach Der Schutz der Spanngliedbündel erfolgt mitFIG. 9 shows the prestressed concrete beam according to FIG. 8 according to the protection of the tendon bundles
der Spannung der Spanngliedbündel und einem durch Torkretierung in einer oder zwei Lagenthe tension of the tendon bundles and one by gate locking in one or two layers
Fig. 10 den Querschnitt längs der LinieB-B in aufgebrachten Mörteischicht9.10 shows the cross section along the line B-B in applied mortar layer9.
F i g. 9. 20 Zur Herstellung eines durchlaufenden Spannbeton-F i g. 9. 20 For the production of a continuous prestressed concrete
Zur Herstellung eines frei aufliegenden Spannbe- trägers mit Vouten, wie er in den F i g. 8 und 9 dar-For the production of a freely resting tension beam with haunches, as shown in FIGS. 8 and 9 show
tonträgers gemäß der Erfindung werden unterhalb gestellt ist, wird wie im Falle des frei aufliegendenSound carriers according to the invention are placed below, as in the case of the free-standing
und außerhalb einer Schalung Spanngliedbündel ί Trägers vorgegangen, wobei jedoch die Spannglied-and outside a formwork tendon bundle ί girder proceeded, however, the tendon
und 2 mit geradlinigem Verlauf in einem anfänglich bündel 10, 11, 12 und 13 verschiedene Längen undand 2 with a straight course in an initially bundle 10, 11, 12 and 13 different lengths and
kräftefreien Zustand angeordnet, wobei die einen 25 Stellungen im Feld besitzen, je nach der Größe derarranged force-free state, with one having 25 positions in the field, depending on the size of the
Enden der Spanngliedbündel in dem oberen Teil der Kräfte auf den Stützen des Trägers und in dessenEnds of the tendon bundles in the upper part of the forces on the supports of the beam and in its
Schalung verankert sind. Des weiteren wird eine Feldern.Formwork are anchored. Furthermore, a fields.
Montagebewehrung 3 in den unteren und oberen Teil Zur Ablenkung der Spanngliedbündel in Höhe derAssembly reinforcement 3 in the lower and upper part To deflect the tendon bundles at the height of the
der Schalung eingesetzt. Vouten können die bei den frei aufliegenden Trägernthe formwork used. Haunches can be found on the free-lying girders
Gleichzeitig werden im Bildungsbereich der 30 verwendeten Mittel angewandt werden oder auchAt the same time in the field of education of the 30 funds used will be applied or also
Trägervouten Verankerungen 4 und Schraubenbol- Verankerungen 14, die die Dorne 7 festhalten undSupport cove anchors 4 and screw bolt anchors 14, which hold the mandrels 7 and
zen5 eingesetzt, wonach ein entsprechender Beton die nach Verschiebung der Dorne und mithin derzen5 used, according to which a corresponding concrete after the shifting of the mandrels and therefore the
eingegossen wird. Nach dem Erstarren des Betons Spanngliedbündel gebogen werden, wodurch sie dieis poured. After the concrete has solidified, tendon bundles are bent, causing them the
wird eine Verspannung der außerhalb der Schalung Dorne in der verschobenen Stellung blockieren.will block a tension of the mandrels outside the formwork in the shifted position.
Hierzu 4 Blatt ZeichnungenFor this purpose 4 sheets of drawings
Claims (2)
Voute verankerten Spanngliedbündel (1, 2, 10 bis Der Erfindung liegt die Aufgabe zugrunde, einen 13) in in Richtung auf die untere, innere Ecke Spannbetonträger der eingangs genannten Art so der Voute eingerückter Stellung hält, und daß die auszubilden, daß er auf einfache Weise herstellbar ist Spanngliedbündel (1, 2, 10 bis 13) an der Unter- 20 und seine Spannglieder zugleich in möglichst geseite des Spannbetonträgers durch eine mittels schützter Lage angeordnet sind.1. Prestressed concrete girder, which is reinforced on the supports after the concrete has hardened by pressing downwards through haunches and pulled tendon bundles 5 and thus has the desired tension that sets outside the prestressed concrete girder To arrange the tendons in a deflected position on its underside and through hold one, is stretched between this and the prestressed concrete device, which the tendon insert a vertical rod that transfers the forces from the bundle of a straight position in the longitudinal direction of the tendons to the concrete of the girder further perpendicular direction . In these known prestressed concrete girders it is steered, characterized in that it is to be regarded as disadvantageous that the arrangement of the deflecting device from one in the lower, pressing and the insertion of supporting rods relatively inner corner of at least one cove is concreting-consuming they th anchoring (4, 14) is formed, which are arranged in a distance from the concrete of the girder arranged in the transverse direction of the girder dome (7), unprotected and the risk of mechanical grips with one end in the concrete of the Exposed to damage and corrosion.
Haunch anchored tendon bundle (1, 2, 10 to The invention is based on the object of a 13) in the direction of the lower, inner corner prestressed concrete beam of the type mentioned so that the haunch holds the indented position, and that the train that it is easy It is possible to produce tendon bundles (1, 2, 10 to 13) on the lower 20 and its tendons at the same time as far as possible on the side of the prestressed concrete girder by means of a protected position.
dem Betonieren in der Schalung im Bereich der Neben den durch die Lösung der Aufgabe erreichunteren, inneren Ecke zumindest einer Voute ten Vorteilen weist der Spannbetonträger zudem eine Verankerung angeordnet wird, daß die einen 35 noch den Vorteil auf, daß er in Feldmitte eine gerin-Enden der Spanngliedbündel in die Schalung im gere Höhe aufweist, da die Spanngliedbündel unmit-Bereich der Voute eingelegt werden, daß nach telbar an der Unterseite des Spannbetonträgers ver-Gießen des Betons und Erhärten desselben die laufen.2. A method for producing a tensioning lower, inner corner of at least one cove einbetonträgers according to claim 1, in which outside 25 toned anchoring is formed, which comprises a mandrel arranged in the beam formwork tendon beam transverse direction, which is initially laid slack, then the tendon bundles anchored with their one ends in the concrete of the haunch verder prestressed concrete girders in the formwork in the direction of and then after the hardening of the concrete the lower, inner corner of the tapered position holds the tendon bundles in the longitudinal direction 30 of the girder, and that the tendon bundles at the The underside is deflected in the vertical direction and thus the prestressed concrete girder is tensioned by means of a Torkreties, characterized in that the mortar layer applied prior to the laying is attached,
concreting in the formwork in the area of the addition of the inner corner at least one haunch th advantages achieved by the solution of the task, the prestressed concrete girder also has an anchorage that one 35 still has the advantage that it has a narrow end in the middle of the field the tendon bundle has in the formwork in the more height, since the tendon bundles are inserted in the immediate area of the haunch, that after pouring the concrete on the underside of the prestressed concrete girder and hardening of the same, the run.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19712142365 DE2142365C3 (en) | 1971-08-24 | 1971-08-24 | Prestressed concrete girder reinforced by haunches at the supports and the process for making it |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19712142365 DE2142365C3 (en) | 1971-08-24 | 1971-08-24 | Prestressed concrete girder reinforced by haunches at the supports and the process for making it |
Publications (3)
Publication Number | Publication Date |
---|---|
DE2142365A1 DE2142365A1 (en) | 1973-03-08 |
DE2142365B2 DE2142365B2 (en) | 1974-08-29 |
DE2142365C3 true DE2142365C3 (en) | 1975-04-24 |
Family
ID=5817634
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE19712142365 Expired DE2142365C3 (en) | 1971-08-24 | 1971-08-24 | Prestressed concrete girder reinforced by haunches at the supports and the process for making it |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE2142365C3 (en) |
-
1971
- 1971-08-24 DE DE19712142365 patent/DE2142365C3/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
DE2142365B2 (en) | 1974-08-29 |
DE2142365A1 (en) | 1973-03-08 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
C3 | Grant after two publication steps (3rd publication) |